Celebrated in American film, song, and popular legend, the San Francisco cable car gets its full due on this well honed site devoted to the history and operation of this cherished form of transportation. Beginning with a virtual tour of the Cable Car Museum, the site contains a full roster of current San Francisco cable cars and a detailed explanation of how a cable car works. Probably the...

The time-warp project is dedicated to preserving information about the advancement of technology. It currently focuses on specific innovations of the 20th century. The site lets users travel decade by decade through illustrated living rooms typical of the period. Technology is grouped into several categories, such as televisions, calculating machines, radio, photography, and telephones. For a...